A railroad flatcar is loaded with crates. The coefficient of static friction between the crates and the floor is 0.27. If the train is moving at 59.7 km/hr, in how short a distance can the train be stopped with a constant acceleration without causing the crates to slide?

A railroad flatcar is loaded with crates. The coefficient of static friction between the crates and the floor is 0.27. If the train is moving at 59.7 km/hr, in how short a distance can the train be stopped with a constant acceleration without causing the crates to slide?

Ok so I understand that mu*mass*g= mass*v^2/2d, and I need to solve for d. But how do I get the mass?

Physics - A railroad flatcar is loaded with crates. The coefficient of static ...
Physics - A railroad flatcar is loaded with crates. The coefficient of static ...
Physics - A railroad flatcar is loaded with crates. The coefficient of static ...
physics - A railroad flatcar is loaded with crates having a coefficient of ...
Physics - The floor of a railroad flatcar is loaded with loose crates having a ...
Physics - The floor of a railroad flatcar is loaded with loose crates having a ...
physics - The floor of a railroad flatcar is loaded with loose crates having a ...
physics - The floor of a railroad flatcar is loaded with loose crates having a ...
Physics - Search: The figure shows three crates being pushed over a concrete ...
Physics 1 - A taut string connects a 5-kg crate to a 12-kg crate (see figure ...